For their vine is of the vine of Sodom, and of the fields of Gomorrah: their grapes are grapes of gall, their clusters are bitter:

Wesley's Notes

32:32 For - As if he had said, This is the reason why their rock hath shut them up. Their vine is of the vine of Sodom - The people of Israel, which I planted as a choice vine, are now degenerated and become like the vine of Sodom, their principles and practices are all corrupt and abominable. Bitter - Their fruits are loathsome to me, mischievous to others, and at last will be pernicious to themselves.

King James Translators' Notes

of the vine: or, worse than the vine

Jamieson-Fausset-Brown Bible Commentary

32. vine of Sodom . grapes of gall-This fruit, which the Arabs call "Lot's Sea Orange," is of a bright yellow color and grows in clusters of three or four. When mellow, it is tempting in appearance, but on being struck, explodes like a puffball, consisting of skin and fiber only.

Matthew Henry's Concise Commentary

32:26-38 The idolatry and rebellions of Israel deserved, and the justice of God seemed to demand, that they should be rooted out. But He spared Israel, and continues them still to be living witnesses of the truth of the Bible, and to silence unbelievers. They are preserved for wise and holy purposes and the prophecies give us some idea what those purposes are. The Lord will never disgrace the throne of his glory. It is great wisdom, and will help much to the return of sinners to God, seriously to consider their latter end, or the future state. It is here meant particularly of what God foretold by Moses, about this people in the latter days; but it may be applied generally. Oh that men would consider the happiness they will lose, and the misery they will certainly plunge into, if they go on in their trespasses! What will be in the end thereof? Jer 5:31. For the Lord will in due time bring down the enemies of the church, in displeasure against their wickedness. When sinners deem themselves most secure, they suddenly fall into destruction. And God's time to appear for the deliverance of his people, is when things are at the worst with them. But those who trust to any rock but God, will find it fail them when they most need it. The rejection of the Messiah by the Jewish nation, is the continuance of their ancient idolatry, apostacy, and rebellion. They shall be brought to humble themselves before the Lord, to repent of their sins, and to trust in their long-rejected Mediator for salvation. Then he will deliver them, and make their prosperity great.